/*
 * Copyright (c) 2007, 2015, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */
/*
 * Copyright 2001,2002,2004,2005 The Apache Software Foundation.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.sun.org.apache.xerces.internal.impl.dv.xs;

import java.util.AbstractList;

import com.sun.org.apache.xerces.internal.impl.dv.InvalidDatatypeValueException;
import com.sun.org.apache.xerces.internal.impl.dv.ValidationContext;
import com.sun.org.apache.xerces.internal.xs.datatypes.ObjectList;

/**
 * Represent the schema list types
 *
 * @author Neeraj Bajaj, Sun Microsystems, inc.
 * @author Sandy Gao, IBM
 * @version $Id: ListDV.java,v 1.7 2010-11-01 04:39:47 joehw Exp $
 * @xerces.internal
 */
public class ListDV extends TypeValidator {

  public short getAllowedFacets() {
    return (XSSimpleTypeDecl.FACET_LENGTH | XSSimpleTypeDecl.FACET_MINLENGTH
        | XSSimpleTypeDecl.FACET_MAXLENGTH | XSSimpleTypeDecl.FACET_PATTERN
        | XSSimpleTypeDecl.FACET_ENUMERATION | XSSimpleTypeDecl.FACET_WHITESPACE);
  }

  // this method should never be called: XSSimpleTypeDecl is responsible for
  // calling the item type for the convertion
  public Object getActualValue(String content, ValidationContext context)
      throws InvalidDatatypeValueException {
    return content;
  }

  // length of a list type is the number of items in the list
  public int getDataLength(Object value) {
    return ((ListData) value).getLength();
  }

  final static class ListData extends AbstractList implements ObjectList {

    final Object[] data;
    private String canonical;

    public ListData(Object[] data) {
      this.data = data;
    }

    public synchronized String toString() {
      if (canonical == null) {
        int len = data.length;
        StringBuffer buf = new StringBuffer();
        if (len > 0) {
          buf.append(data[0].toString());
        }
        for (int i = 1; i < len; i++) {
          buf.append(' ');
          buf.append(data[i].toString());
        }
        canonical = buf.toString();
      }
      return canonical;
    }

    public int getLength() {
      return data.length;
    }

    public boolean equals(Object obj) {
      if (!(obj instanceof ListData)) {
        return false;
      }
      Object[] odata = ((ListData) obj).data;

      int count = data.length;
      if (count != odata.length) {
        return false;
      }

      for (int i = 0; i < count; i++) {
        if (!data[i].equals(odata[i])) {
          return false;
        }
      }//end of loop

      //everything went fine.
      return true;
    }

    public int hashCode() {
      int hash = 0;
      for (int i = 0; i < data.length; ++i) {
        hash ^= data[i].hashCode();
      }
      return hash;
    }

    public boolean contains(Object item) {
      for (int i = 0; i < data.length; i++) {
        if (item == data[i]) {
          return true;
        }
      }
      return false;
    }

    public Object item(int index) {
      if (index < 0 || index >= data.length) {
        return null;
      }
      return data[index];
    }

        /*
         * List methods
         */

    public Object get(int index) {
      if (index >= 0 && index < data.length) {
        return data[index];
      }
      throw new IndexOutOfBoundsException("Index: " + index);
    }

    public int size() {
      return getLength();
    }
  }
} // class ListDV
